Red Sox's Jon Lester accused of foreign substance on glove

Boston Red Sox catcher David Ross (left) and starting pitcher Jon Lester celebrate after Lester started a double play turned by Ross on a ground ball by St. Louis Cardinals' David Freese to end the top of the fourth inning during Game 1 of the World Series between the St. Louis Cardinals and the Boston Red Sox on Wednesday, Oct. 23, 2013, at Fenway Park in Boston. (AP Photo/St. Louis Post-Dispatch, Chris Lee)

BOSTON — A Cardinals minor leaguer has suggested Boston pitcher Jon Lester may have used a foreign substance to aid his pitches during his win over St. Louis in the World Series opener.

Tyler Melling wrote Wednesday night on Twitter: "Jon Lester using a little Vaseline inside the glove tonight?" The 25-year-old pitcher with Palm Beach in the Florida State League posted a screen shot appearing to show discoloration on Lester's black glove.

Section 8.02 of the Official Baseball Rules says a pitcher "shall not apply a foreign substance of any kind to the ball" and says the penalty for a violation is ejection and an automatic suspension.

Major League Baseball said in a statement Thursday that "we cannot draw any conclusions from this video. There were no complaints from the Cardinals and the umpires never detected anything indicating a foreign substance throughout the game."

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Melling's tweet was later deleted.

Lester allowed five hits in 7 2-3 scoreless innings with eight strikeouts and a walk as the Red Sox won 8-1.